Hi, the procedure sounds logical. A small example snipet please. My table is something like that:

......ChannelName|TagName |... Frequency

1....Ch1...............Pomp1..........1000

2....Ch1...............Pomp2..........3000

3....Ch2...............Flowmeter.....2000

..


Here Tagname s are unique. TreeView should be something like that...


ChannelName TagName Frequency

-Ch1--------------Pomp1..........1000
| |
| -----------------Pomp2..........3000
|
---Ch2------------Flowmeter.....2000
|
...